USN-5675-1: Heimdal vulnerabilities

Severity

Medium

Vendor

Canonical Ubuntu

Description

Isaac Boukris and Andrew Bartlett discovered that Heimdal’s KDC was not properly performing checksum algorithm verifications in the S4U2Self extension module. An attacker could possibly use this issue to perform a machine-in-the-middle attack and request S4U2Self tickets for any user known by the application. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2018-16860) It was discovered that Heimdal was not properly handling the verification of key exchanges when an anonymous PKINIT was being used. An attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and Ubuntu 18.04 LTS. (CVE-2019-12098) Joseph Sutton discovered that Heimdal was not properly handling memory management operations when dealing with TGS-REQ tickets that were missing information. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-3671) Michał Kępień discovered that Heimdal was not properly handling logical conditions that related to memory management operations. An attacker could possibly use this issue to cause a denial of service. (CVE-2022-3116) Update Instructions: Run `sudo pro fix USN-5675-1` to fix the vulnerability. The problem can be corrected by updating your system to the following package versions: libhcrypto4-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libwind0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libroken18-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libgssapi3-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-kcm – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libhdb9-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libasn1-8-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libsl0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkadm5clnt7-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-kdc – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkdc2-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-servers – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libheimntlm0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-docs – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libheimbase1-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkrb5-26-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libotp0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-dev – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkafs0-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libhx509-5-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-multidev – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 libkadm5srv8-heimdal – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 heimdal-clients – 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1 Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

CVEs contained in this USN include: CVE-2018-16860, CVE-2021-3671, CVE-2019-12098, CVE-2022-3116.

Affected Cloud Foundry Products and Versions

Severity is medium unless otherwise noted.

• Bionic Stemcells
  • 1.x versions prior to 1.122
  • All other stemcells not listed.
• cflinuxfs3
  • All versions prior to 0.328.0
• CF Deployment
  • All versions prior to 23.0.0, or later versions with Bionic Stemcells prior to 1.122 or Xenial Stemcells prior to 621.304

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below. The Cloud Foundry project recommends upgrading the following releases:

• Bionic Stemcells
  • Upgrade 1.x versions to 1.122 or greater
  • All other stemcells should be upgraded to the latest version available on bosh.io.
• cflinuxfs3
  • Upgrade all versions to 0.328.0 or greater
• CF Deployment
  • Upgrade all versions to 23.0.0 or greater, upgrade Bionic Stemcells to 1.122 or greater, and upgrade Xenial Stemcells to 621.304 or greater

History

2022-12-07: Initial vulnerability report published.